What’s that sound tell you?

[crimsonhokie]

Attached is a brief video of my Bronco when trying to crank it. I was repeatedly getting low battery notices after getting a Rock Slide Engineering steps installed (by my prior research, it seems like the negative should’ve gone to ground vs battery terminal). I just picked up a multimeter this afternoon to check the charge and try to confirm if the wiring is correct. It turned off right after backing out of the driveway and now won’t start. Any help is much appreciated.

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[Squatch]

1. What was the reading across the battery posts?
2. If you live near am Autozone, take the battery out and they'll charge it for free.
3. Put the negative on a good ground.
4. Put the probes on the top of each fuse under the hood (usually 0-20 Ohm setting) and make sure none of them are blown. Also, press down on the center of each lightly with your finger. They are sometimes loose.

 

[crimsonhokie]

1. What was the reading across the battery posts?
2. If you live near am Autozone, take the battery out and they'll charge it for free.
3. Put the negative on a good ground.
4. Put the probes on the top of each fuse under the hood (usually 0-20 Ohm setting) and make sure none of them are blown. Also, press down on the center of each lightly with your finger. They are sometimes loose.

Thanks for input.
1. 12.3 sitting and 10.7 when trying to start.
2. Got it connected to a Noco charger now.
3. Negative’s on factory ground. No connections seem loose.
4. I’ll go check fuses

 

[Ducati1098]

Doesn’t sound like it has anything to do with your battery.

From the video, that thing was cranking plenty fast and long enough to start if it was going to. Honestly sounds like you’re not getting fuel or something else engine related.

 

[Brian_B]

12.3V for a resting battery is a little bit low, but not crazy low.

A couple of things to try:

You can try trickle charging the battery with it in the vehicle (make sure to install the charger so the BMS sees it - negative lead not directly on battery post--- clip it over on the wing or chassis). Letting the battery charge to 100% could take a while, even with a higher amp charger. I'd recommend over night.

Once the battery is done cooking, disconnect the negative lead for about 20 minutes to reboot all the computers. Then see what it does when you crank it.

I'd do that before I went crazy trying to diagnose anything else; a lot of these weird issues are just a computer getting a bit sideways somewhere and this tends to work more often than not.

 

[crimsonhokie]

12.3V for a resting battery is a little bit low, but not crazy low.

A couple of things to try:

You can try trickle charging the battery with it in the vehicle (make sure to install the charger so the BMS sees it - negative lead not directly on battery post--- clip it over on the wing or chassis). Letting the battery charge to 100% could take a while, even with a higher amp charger. I'd recommend over night.

Once the battery is done cooking, disconnect the negative lead for about 20 minutes to reboot all the computers. Then see what it does when you crank it.

I'd do that before I went crazy trying to diagnose anything else; a lot of these weird issues are just a computer getting a bit sideways somewhere and this tends to work more often than not.

This seemed to do the trick. Worked great today. Thanks

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